The book "Boy Pony Riders in New Mexico; or, The End of the Silver Trail" by Frank G. Petchin is an exciting adventure story about four boy friends who embark on an exciting journey to the west, where exciting challenges and incredible discoveries await them. During the journey, they meet interesting characters, find themselves in danger and help each other in difficult situations. Courage, friendship and adventure are intertwined in the pages of this book, making it an exciting read for the whole family.